Profile: Nation Medical Supplies offers medical equipments, medical supplies and medical products and hospital equipments. Spot check monitor for blood oxygen saturation and heart rate utilizes reflectance pulse oximetry (rpo) and long-lasting battery which lasts for more than 1,000 hours, using only a fraction of the power of conventional devices. Our product is resistant to many forms of motion. Our Posture Pump® combines both neck and back exercises into one leatherette comfort pad which attaches both exercisers, and conveniently folds & locks together for easy comfort pad which is designed to stretch and fit all body types. It helps to relieve neck & back stiffness and reshapes curves. Our standard otoscope with 10 disposable specula and bag features standard illumination with 2.5-volt vacuum bulb, three-times magnification and rotating lens. Dimmable rheostat includes 20 disposable ear specula (10 each 2.5 mm and 4.0 mm) and matching zippered bag #requires two "C" batteries (not included) or K.